The 33rd New York Independent Battery lost 1 officer and 12 enlisted men to disease during the Civil War.

1863
Organized at Buffalo, N.Y.
September 4 Mustered in at Elmira, N.Y. and left State for Washington, D.C.
September Duty at Camp Barry, Defenses of Washington, 22nd Army Corps
1864
February At Yorktown and Gloucester Point, Va. Attached to United States Forces, Yorktown, Va., Dept. of Virginia and North Carolina
April Attache to Artillery, 3rd Division, 10th Army Corps, Army of the James
May 4-28 Butler’s operations on south side of the James River and against Petersburg and Richmond
May 5 Occupation of City Point and Bermuda Hundred, Va. attached to Artillery, 10th Army Corps
May 8-10 Swift Creek
May 12-16 Operations against Fort Darling
May 14-16 Battle of Drury’s Bluff
May 16-June 15 Bermuda Hundred
June 2 Action at Bermuda Hundred
June 15 Siege operations against Petersburg and Richmond. Attached to Artillery, 3rd Division, 10th Army Corps.
June 15-18 Assaults on Petersburg
August Attached to Artillery Brigade, 10th Army Corps
October Attached to Separate Brigade, Dept. of Virginia and North Carolina. Assigned to duty as Garrison Artillery at Fort Pocahontas on James River.
1865
January Duty in the Defenses of Bermuda Hundred, Va. Attached to Ferrero’s Division, Defenses of Bermuda Hundred, Va.
March 28-April 2 Operations resulting in the fall of Petersburg and Richmond
April-June Duty at Petersburg. Attached to Dept. of Virginia.
June 25 Mustered out